Aqueous Zn-based electrochemical technologies hold promise for large-scale energy storage applications, yet challenges persist in the unsatisfied Zn reversibility arising from an unstable Zn/electrolyte interface. Here, we employ molecular interface engineering using amphiphilic Pluronic triblock copolymers as electrolyte additives to stabilize the Zn anodes. With a balanced hydrophilic–hydrophobic nature, Pluronic F127 adsorbed on the Zn surface constructs a hydrodynamic interphase, where the hydrophobic PPO center shields the Zn surface from water-induced side reactions, while PEO side blocks guide the homogeneous Zn²⁺ redistribution. Additionally, F127 contributes to the Zn²⁺ solvation structure to weaken the water activity at the interfacial region. As a result, F127 additive enables cycling durability over 9300 and 3100 h at 1 and 5 mA cm^–2, respectively, and considerable cyclability with high-capacity retention across a wide current density range in Zn||VO₂ full cells. This study highlights the potential of amphiphilic block copolymers in stabilizing metallic anode interfaces in aqueous electrolytes.

中文翻译：

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通过两亲性三嵌段共聚物分子界面工程稳定锌阳极

水基锌电化学技术有望实现大规模储能应用，但由于锌/电解质界面不稳定而导致锌可逆性不令人满意，因此仍然存在挑战。在这里，我们采用分子界面工程，使用两亲性 Pluronic 三嵌段共聚物作为电解质添加剂来稳定锌阳极。具有平衡的亲水-疏水性质，吸附在 Zn 表面上的 Pluronic F127 构建了一个流体动力学界面，其中疏水性 PPO 中心保护 Zn 表面免受水引起的副反应的影响，而 PEO 侧嵌段则引导均匀的 Zn ²⁺再分布。此外，F127有助于Zn ²⁺溶剂化结构，削弱界面区域的水活性。因此，F127 添加剂能够在 1 mA cm –2 和 5 mA cm ^{–2下分别实现超过 9300 小时和 3100 小时的循环耐久性，以及在 Zn||VO} ₂全电池中在宽电流密度范围内具有高容量保持能力的相当大的循环性能。这项研究强调了两亲性嵌段共聚物在稳定水性电解质中金属阳极界面方面的潜力。